Where an immigrant population from oversea lands occupies the coastal hem of a country, rarely do they preserve the purity of their race. Coming at first with marauding or trading intent, they bring no women with them, but institute their trading stations or colonies by marriage with the women of the country. The ethnic character of the resultant population depends upon the proportion of the two constituent elements, the nearness or remoteness of their previous kinship, and the degree of innate race antagonism. The ancient Greek elements which crossed the Aegean from different sections of the peninsula to colonize the Ionian coast of Asia Minor mingled with the native Carian, Cretan, Lydian, Pelasgian, and Phoenician populations which they found there.[494] On all the barbarian shores where the Greeks established themselves, there arose a mixed race--in Celtic Massilia, in Libyan Barca, and in Scythian Crimea--but always a race Hellenized, born interpreters and mercantile agents.[495] A maritime people, engrossed chiefly with the idea of trade, moves in small groups and intermittently; hence it modifies the original coastal population less than does a genuine colonizing nation, especially as it prefers the smallest possible territorial base for its operations. The Arab element in the coast population of East Africa is strongly represented, but not so strongly as one might expect after a thousand years of intercourse, because it was scattered in detached seaboard points, only a few of which were really stable. The native population of Zanzibar and Pemba and the fringe of coast tribes on the mainland opposite are clearly tinged with Arab blood. These Swahili, as they are called, are a highly mixed race, as their negro element has been derived not only from the local coast peoples, but also from the slaves who for centuries have been halting here on their seaward journey from the interior of Africa.[496] [See map page 105.] [Sidenote: Multiplicity of race elements on coasts.]